refactor(skilldesc): 重构技能描述渲染逻辑，统一驻场光环展示

1.  调整英雄头像预制体的UI布局参数与文字颜色样式
2.  新增驻场光环描述配置表，标准化光环效果的文字与数值渲染
3.  重构技能描述生成逻辑，使用实时数值替代手写文案避免数值漂移
4.  修改富文本高亮色为深绿色以适配深色面板

assets/resources/gui/element/herobox.prefab

@@ -8942,7 +8942,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": -20,
+      "y": 55,
       "z": 0
     },
     "_lrot": {
@@ -8988,7 +8988,7 @@
     "_anchorPoint": {
       "__type__": "cc.Vec2",
       "x": 0.5,
-      "y": 0.5
+      "y": 1
     },
     "_id": ""
   },
@@ -9015,12 +9015,12 @@
     "_fontSize": 15,
     "_fontColor": {
       "__type__": "cc.Color",
-      "r": 255,
-      "g": 255,
-      "b": 255,
+      "r": 32,
+      "g": 32,
+      "b": 32,
       "a": 255
     },
-    "_maxWidth": 0,
+    "_maxWidth": 190,
     "_fontFamily": "Arial",
     "_font": null,
     "_isSystemFontUsed": true,